Commutator connection



Feb. 0. 1925. 1,525,967

J. M. VOGEL COMMUTATOR CONNECTION Filed Auez. 2, 1924 gnaw Mo's PatentedFeb. 10, 19 25. UNITED STATES PATENT OFFICE.

JOSEPH M. VOGEL, OF ADRIAN, MICHIGAN, ASSIGNOR TO UNITED ELECTRICALMANU- COMPANY, OF- ADRIAN, MICHIGAN, A. CORPORATION OF MICHIGAN.

COMMIITATOR CONNECTION.

' Application filed August 2, 1924. Serial 1a. 729,553.

To allwlzom it may cancer-22.:

Be it known that I, JOSEPH M. VOGEL, a citizen of the United States, anda resident of Adrian, in the county of Lenawee and State of Michigan,have invented a new and useful Commutator Connection, which invention isfully set forth in the following specification.

This invention relates to commutators for use in connection withelectric motors and generators, and particularly to the mannerofconnecting the segment thereof to the respective armature winding.

It is a slow and tedious matter, with the present practices, to connectthe different armature windings to the respective bars of an' associatedcommutator and to solder the joints thus formed, and the purpose of thepresent invention is to provide a simple and efficient method and meansfor accomplishing this in a rapid and easy manner and without thenecessity of employing skilled labor therefor, and which will at thesame time permit the joints or points of connection to be quicklysoldered by dipping instead of soldering each union separately.

The invention is fully described in the following specification, andwhile in its broader aspect it is capable of embodiment in numerousforms, one embodiment thereof is illustrated in the accompanyingdrawings, in which,

Figure 1 is an outer end View of a commutator embodying the invention,with windings shown as connected to a few of the connecting members andwith one connection soldered. Figure 2 is an opposite end view thereof.Fig. 3 is a side elevation of the commutator with a part broken away andwith some of the winding connecting fingers thereof in initialconnecting position and others bent into final usable position, and Fig.4 is a fragmentary side elevation of an electric motor with theconnections between the windings and commutator seg .ments embodying theinvention and in usable position.

Referring to the drawings, 1 designates the armature of an electricmotor or genorator, 2 the different windings thereof and 3 thecommutator, the connections between the segments of which and thearmature windings embody the invention.

The commutator 3 in its present preferred embodiment comprises acircular core 4 of bakelite or other suitable insulating material, whichis provided with a central openmg 5 for fitting the armature shaft 6.The segment bars 7 of the commutator are disposed in parallelequidistantly spaced relation around the periphery of the core, and eachis provided at its ends with inwardly rojecting ears 8, which render thebars of -form and adapt them to be seated in straddling relation on thecore with the ears 8 closely embracing the core ends to hold the bars inposition thereon. The bars are further securely held in position on thecore by pins 9 which are projected through holes bored or formed throughthe ears and core in parallel relation to the core axis, the pins beingheaded at one end and having their opposite ends upset to preventwithdrawal, a pin being provided for each segment.

The pins 9 also serve the purpose of securing the armature windingconnecting fingers 1() to the inner ends of the different segments 7,said fingers being apertured at one end to receive the pins and bedisposed, in the present instance, between the headed ends of the pinsand the adjacent ears 8 of the segment bars.

The fingers 10 are of bendable nature and of a material which will serveas a good electrical conductor, and will also permit soldering of thearmature winding ends thereto, such, for instance, as brass. The fingers10 are of suflicient length to project a short distance beyond thecommutator periphery and to adapt them to be bent around and over thecommutator periphery in spaced relation thereto and toward its oppositeends to facilitate soldering, as hereinafter described. Each finger isprovided near its outer end with an opening or side notch 11 tofacilitate engagement of an end of an armature winding 2 with thefinger, the wire being preferably wrapped one or more times around thefinger and through the notch or opening 11.

When all of the windings of an armature have been secured to thedifferent fingers of the associated commutator, the fingers areinitially disposed in outwardly bent relation over the adjacent endportions of the commutators, as shown by the fingers in the left-handportion of Fig. 3, thereby permit ting the end of the commutatoropposite to the armature to be dipped into a soldering solution asufficient depth to submerge the downwardly projecting ends of thefingers 10 therein, so that the point of connection of'the windings withthe fingers will be securely soldered. This having been done, thecommutator is cleaned of any solder which may have adhered thereto andwhich might cause short circuiting, and the fingers 10 are then bentaway from the commutator and over or adjacent to the associated end ofthe armature, as shown in Fig. 4.

It is found in practice that this makes a very eflicient, easy and rapidmethod of connecting the armature winding to the commutator segments asit obviates the necessity of skilled labor for the purpose and enablesall of the winding connections with the commutator to be soldered at onetime instead of being separately soldered, as is now customarily done.

I wish it understood that my invention is not limited to any specificconstruction, arrangement, or form of the parts, or to the differentsteps and order of the method employed, as it is capable of numerousmodifications and changes without departing from the spirit of theclaims. 7

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is I 1. A commutator having a core ofinsulating material. 'U-sha ed segmental bars straddling the perip eryof the core in equidistantly' spaced relation around the core, thesegment legs and core having aligned a ertures, retaining pins disposedwithin said apertures, and armature winding connecting fingers securedat one end to each segment by the retaining pin for such segment.

2. A commutator having an insulating core, a plurality of segment barsdisposed in peripherally spaced parallel relation around the peripheryof the core and each having ears projecting inward from its ends,retaining pins for the segments extending through the ears thereof andthe core, and an armature winding connecting finger projecting from eachsegment bar at one end of the commutator and connected thereto by theretaining pin for such bar.

, 3. The method of electrically uniting the windings of an armature tothe associated commutator bars, which bars have bendable fingersprojecting from the armature end thereof, consisting in engaging therespective Winding terminals with the fingers then dipping the oppositeor outer end of the commutator in a soldering solution with the terminalconnecting ends of the fingers disposed in position to be submerged inthe solder before the dipping has continued to a depth for the solder toengage the armature and after removing the commutator from the solutionbending the fingers away from the commutator to usable position.

4. The method of connecting armature windings to the respectivecommutator segments, consisting in providing the end of each segment adacent to the armature with a bendable conductor finger, engaging therespective armature winding terminals with the fingers, dipping theopposite end of the commutator in a soldering solution, the terminalengaging ends of the fingers, before said dipping, being disposed inposition for the solder to submerge the same before the commutator hasbeen completely submerged, and after removal of the commutator from thesoldering bath bending the free ends of the fingers away from theadjacent commutator end in usable position.

In testimony whereof I have hereunto signed my name to thisspecification.

JOSEPH M. VOGEL.

